BEIJING, May 23 -- Naval Senior Captain Li Xi, spokesperson for the Chinese PLA Eastern Theater Command, said in a written statement that on May 23, the PLA Eastern Theater Command continued to conduct drills on such subjects as sea assaults, land strikes, air defense and anti-submarine in the airspace and waters to the north and south of Taiwan Island, in a bid to test the multi-domain coordination and joint strike capabilities of the theater command's troops.